True (A) or False (B) ______The atomic number is equal to the number of protons

Question

True (A) or False (B) ______The atomic number is equal to the number of protons that each atom of a given element has and is what defines an element. ______ Isotopes are atoms with different number of electrons but the same number of protons. ______ The Mass number is the sum of the protons and neutrons for an atom. ______ The molar mass (MM) is the number of moles per one gram of a substance. ______The constant Avogadro's number (N_A) equals 6.022 times 10^23. We know that 1 mole contains 6.022 times 10^23 atoms.

Explanation / Answer

1) True

the atomic number is equal to the number of protons that each atom of given element

2) False

Isotopes is having same number of electrons , same number of protons and different number of neutrons

3) True

The mass number is sum of the the protons and neutrons in the atom

4) True

the molar mass is the number of moles per one gram of substance

5) True

Avagdronumber is 6.022x1023 , that 1 mole contains  6.022x1023 atoms

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